which is the simplest of all atoms?
OH-
H+
H3O+
H
The simplest of all atoms is hydrogen (H).
To arrive at this answer, we need to understand that atoms are the basic building blocks of matter. They consist of a nucleus made up of protons and neutrons, surrounded by electrons. The simplest atom is the one with the fewest subatomic particles.
In the given options, hydrogen (H) is the only atom. It consists of just one proton (located in the nucleus) and one electron. It does not have any neutrons, as its atomic mass is approximately 1.
By comparing the options and understanding the basic structure of atoms, we can determine that hydrogen (H) is the simplest atom.